body {
  font-family: sans-serif;
  background-image: url('images/bottles.jpeg');
  background-size: cover;
  background-attachment: fixed;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 99vh;
  font-size: 60px;
}

.main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 90vh;
  width: 90vw;
  background-color: white;
  opacity: 0.75;
}

input {
  font-size: 100%;
  width: 25vw;
  border: 1px solid grey;
}

.label {
  height: 6vh;
  width: 25vw;
  margin-right: 3vw;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.input {
  height: 6vh;
  display: flex;
  justify-content: left;
  align-items: center;
  margin: 2vw;
}

.units {
  margin-top: 6vh;
  height: 6vh;
  min-height: 6vh;
  color: green;
}